Elastic-fluid turbine.



G. ROTH.

-" ELASTIC FLUID TURBINE.

APPLICATION FILED 001*. 18,1906.

924,108. Patented June 8,1909.

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1 M M a UNITED STATES PATENT OFFICE.

cam. ROTH, or mica, csamun-asslcroa T MELMS & PFENNINGER G. M. B. 11., or

MUNICH-HIRSCHAU, BAVARIA, GERMANY, A COMPANY.

nm'rrc-rmm mam-n.

m. mace.

Specification of Letters Patent.

Patented June 8, 1909.

a lication filed October 10, lacs. Serial No. 339,579.

To'all whom it may comm: Y

' Be it known that I, Cm Ro'rn, engineer,-

, a citizen of Switzerland, and 'a resident of Munich, '94 Ismaningerstrasse, in' the King;

5 dom of Bavaria, Germany, have invented a certain, new and useful Improvement in Elastic-Fluid Turbines; and I do hereby declare-the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appcrtains to make and use the same, reference being bad to the accompanying" drawings,

and to letters of reference marked thereon,

which form a part of this specification.

My invention relates to elastic fluid turhines and has for its object to provide a turbine of this type which will be free from all axialthrust and in which the loss of steam through the packing betweenthe high and low pressure parts will be reduced to a minimum.

The invention will be described-with refer.- cnce to the accompanying drawing which illustrates in' longitudinal section one-example of a turbine embodying the features of the invention, and in which:

a is the high pressure steam chest, I) the high pressure part, c the intermediate or first low' pressure part, and (l a further low pressure part, of the turbine. J

For the purpose of the present inve tion, the turbine is arranged, as shown, in such a manner thatthe steam entering at a first traverses the h pressure part .of'the turbine 7) in one ction, and then the low pressure parts of the turbine c, d in the opposite direction. The high -pressure part b is mounted on a drum of greater diameter than the adjacent orimmediately following low pressure part c and can be advantageously formed as an impulse turbine with-partial admission, or in certain circumstances as a reaction turbine.- Thelatte'r may, ifor in-.

stance, be the case where the steam of low? 45 cred tension, or a part of-it, after having- I done work in the-high pressure art, is drawn ofifrom the turbine for any ot er purposes, such as heating.' the end 'of'the high pressure part, in which the steam has exp ded. .1 s y about r r t drum terminates to'form a chest'k. This chest'lagis shut off from the outer air by means of a st box or labyrinth packing f' on the shaft e. e steam-then after pass- 'ing'the high pressure part a traverses a resure part, and a single'packing between the "between the shaft and the caslng, a drum having a high pressure part and a low was turn channel 9 and enters the intermediate or 'lowplessure fportion 0, arranged on the reduced part 0 the drum, which portion can 'be then. increased in diameter in the known h' which shuts off the high pressure admission steam a ainst the pressure prevailing at the end'o'ft e high pressure part of the turbine.

In place of the labyrinth packing h a few rows of blades-can be arranged with smaller or larger free" sectional area, so that these rows of packing blades are connected-with, the said high pressure part so that a part of the steam passeswith a lowered tension direct to the part c. Between this packing and the high pressure part on'thewider portion of the drum is provided an annular surface or shoulder 2', the dimensions of which are so a calculated with reference to the various pres sures and surfaces that, taking into consideration any onesided axial pressure that may occur,'the turbine is freed from axial or end thrust. Beyond the low ressure part is another stufiing box or la yrinth packing l, which must be arranged to prevent the outside airrushing into the vacuum. This packing may be attained by conveying the steam escaplng, intentionally or otherwise, from the stuffing box 0 of the high pressure part through the pipe m to the packing Z.

. What I claim is:

- 1. In an elastic fluid turbine, the combination with the shaft, of a casing, a packing between the shaft and the casing, a drum having a high pressure part and a low prescasingand the drum located between the high pressure part and the low pressure part.

2. In an elasticfluid turbine, the combination with the shaft, of a casing, a packing sure part, means for causing the fluid/ to traverse the low pressure part inthe opposite direction to the high pressure part, and. a single packing between the casing and the drum located etween the highipressure part andthe low pressure. art.

3. In an elastic flui turbine,-the comblnation with the shaft, of a 'casmg, a packing between the shaft and the casing, a drum low pressure part, an

having a high pressure part and a low pressure part, means for causing the fluid to traverse the low ressure part in the opposite direction to the liigh pressure part, a sin 1e packing between the casing and the drum 0- cated between the high ressure part and the d a shoulder on the drum located between the high pressure part and the last-named packing.

4. In an elastic fluid turbine, the combination with the shaft, of a casing formed with a steam chest extending downwardly to the shaft, a packing for the steam chest between the shaft and the casing, a drum having a high pressure part directly communicating with the steam chest and having a low pressure part, blades in said high pressure part,

seams an inlet for the motive fluid to the high pressure part, apacking on the low ressure part of the drum adjacent to the flui inlet, blades in the low pressure part, a shoulder between said packing and the blades of the high pres sure art, and means for conductin the motive uid from the blades of the high pressure part to the blades of the low pressure part.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

CARL ROTH.

Witnesses:

ABRAHAM SCHLESINGER.

LOUIS G. MULLER. 

